380255921 has 2 divisors, whose sum is σ = 380255922. Its totient is φ = 380255920.

The previous prime is 380255893. The next prime is 380255929. The reversal of 380255921 is 129552083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220106896 + 160149025 = 14836^2 + 12655^2 .

It is an emirp because it is prime and its reverse (129552083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 380255921 - 2⁶ = 380255857 is a prime.

It is not a weakly prime, because it can be changed into another prime (380255929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190127960 + 190127961.

It is an arithmetic number, because the mean of its divisors is an integer number (190127961).

Almost surely, 2^380255921 is an apocalyptic number.

It is an amenable number.

380255921 is a deficient number, since it is larger than the sum of its proper divisors (1).

380255921 is an equidigital number, since it uses as much as digits as its factorization.

380255921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 380255921 is about 19500.1518199218. The cubic root of 380255921 is about 724.4782109986.

The spelling of 380255921 in words is "three hundred eighty million, two hundred fifty-five thousand, nine hundred twenty-one".